Propeller-blade



V. H. LEINWEBER.

PROPELLER BLADE.

APPLICATION FILED JUNE 26, 1918.

1,344,640. Patented June 29; 1920.

jizfapi'of. n dfol 1 .ltiltwebel I j tions and arrangements of .parts hereinafter.

UNITED STATES PATENT OFFICE.

VICTOR H. LEINWEBER, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO CONTINENTAL .AIR CRAFT & TRANSPORTATION COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ARIZONA.

PROPELLEBr-BLADE.

Specification of Letters Patent. Patented J 29 1920 Application filed June 26, 1918. Serial-No. 242,018.

To all whom it may concern:

Be it known that I, VIo'roR H. LEINWEBER, a citiien of the United States, and a resident of the city of- Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Propeller- Blades, of which the following is a specification.

My invention relates to improvements propeller blades, especially adapted for use .on aeroplanes, airships, and the like, and

has for its object the production of an improved construction of propeller blades whereby strong and durable blades may be conveniently and economically made out of metal.

Other objects will appear hereinafter. The invention consists in the combinadescribed and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which: I

Figures 1, is a longitudinal section of a propeller blade embodying the invention,

Fig. 2, an enlarged section taken on line 22 of Fig. 1,

Fig. 3, an enlarged section taken on line 33 of Fig. 1,

Fig. 1, an enlarged section taken on line 44 of Fig. 1, Fig. 5, an enlarged'section taken on line 5-5 of Fig. 1, and I g 1 Fig. 6, an enlarged section taken on line 6-43 of Fig. l. I

The preferred form of construction, as illustrated in" the drawings, ",comprises an interior framework made up of open frame sections 7 preferably of aluminum or other light metal cast in the forms indicated, and

secured together at their joiningedges by electrical welding, brazing, or the like. At.

intervals the various frames 7 are provided with suitable lugs 8, having rivet holes extending therethrough, adapted to receive the frame is provided with a central pivotal socket 12 adapted to receive a pivoting stud or pintle for pivoting the blade for angular adjustments to vary -'the pitch thereof. Likewise, the innermost section 13 is equipped with a shaft or axle extension 14 having an annular central coller 15, which is adapted to be mounted in a suitable bearing to cooperate with the socket 12-for such ad'ustment.

y this arrangement, a metal propeller blade may be readily made which is strong and serviceable in use and comparatively li ht in weight.

. hile I have illustrated and described the preferred form of construction for carrying my invention into effect, this iscapable of variation and modification without departing from the spirit of the invention. I therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is 1.,A propeller blade comprising an interior openwork frame comprising a plua plurality of sections each of which extends the Width of the interior of the blade; and

an exterior metallic shell inclosing said frame, substantially as described.

3. A propeller blade comprising'an interior openwork frame made in secetions secured together and each extending the width of the interior of the blade; and an exterior shell inclosing said frame, substantially as described.

4. A propeller blade comprising an interior openwork metallic frame made in sections secured together; and an exterior metallic shell inclosing said frame, sub stantially as described. p

5. A propeller blade comprising an interior openwork metallic frame made in sections secured together, there being a piv otal socket formed in the outermost section; a pivotal axle on the innermost section; and in exterior metallic shell covering and inclosing said frame and secured thereto by means of rivets extending therethrough, substantially as described.

6. A propeller blade comprising an interior openwork frame made in sections, said sections abutting each other and se cured together, and'a'n exterior shell, inclosing said frame and secured thereto.

7. A propeller blade comprising an interior openwork metallic frame made in sections, said sections abutting each other and secured together and an exterior I118- tallic shell inclosing said frame and secured 1o thereto.

In testimony whereof I have signed my name to this specification in the presence of two subsoribin -Witnesses.

VI TOR H. LEINWEBER.

Witnesses:

JOSHUA R. H. Porrrs. HELEN F. LILLIs. 

